I think they are definitely worth it because they are hard as hell, I got a 63% on the first one and a 68% on the second one. It is a bit awkward because they don’t let you save or print the results (they want you to take the exam again and pay for it, but that’s a rip off in my view - Schweser charges less per test if you do the math, without such limitations).
But despite the fact that they’re expensive and limited, they are very worth it and I will do it again for the next level. Nothing like a hard exam to kick you in the butt and force you to get nervous!